To use this function, you must select "Tolerance ranges (position)" in the configuration view.
In contrast to many other monitoring systems, KOMET® BRINKHAUS systems can perform so-called "position-based monitoring". This is particularly useful if the feed override is not kept constantly at 100%. If a process runs slower or faster, e.g. because the feed override in the process is changed, then position-based monitoring can compensate for this. The feature is important for some special processes like the monitoring on broaching machines.
The next figure shows an example of what happens during conventional, time-based monitoring, when the feed override is not kept constantly at 100%. As the process runs faster, it breaches the limits – without an error occurring. This unfavorable behavior occurs on almost all process monitoring systems available on the market.
Time-based breakage detection with increased feed override
KOMET® BRINKHAUS systems, on the other hand, can perform so-called position monitoring. With this, the monitoring determines the currently valid value for the upper and lower limits, based on the axis position. The figure below shows the same process as before, the difference being that it does not represent time-based breakage detection, but rather position-based breakage detection.
Position-based monitoring with increased feed override
You can see how position-based breakage detection monitors the process correctly. As soon as a significant process deviation occurs, an alarm is triggered.
Behavior with activated offset compensation/zeroing
In individual cases, the "Offset compensation" function can be useful. This helps with monitoring a process despite significantly fluctuating signals. The function makes device configuration more complicated, but often improves the monitoring result.
The figure below shows an example process in which offset compensation has not been activated.
A process without offset compensation
In this example, effective monitoring starts at the time "1.2 s". Only after this time are the upper and lower limits drawn in and monitored for compliance.
If offset compensation has been activated in the relevant monitoring channel, the current signal height is determined at the start of monitoring (mean value above 50 ms) and this value is deducted from the signal henceforth. The impact is shown in the configuration view below:
Process with offset compensation
Effective monitoring starts at a signal height of "0". This can be useful if a signal curve runs in part higher and in part lower throughout. Monitoring works better because each process starts effectively at "0" due to offset compensation.
Any change in the monitoring parameters is shown immediately in adapted tolerance ranges in the configuration view.